2DFL

Crystal structure of left-handed RadA filament


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.226 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of the left-handed archaeal RadA helical filament: identification of a functional motif for controlling quaternary structures and enzymatic functions of RecA family proteins

Chen, L.T.Ko, T.P.Chang, Y.C.Lin, K.A.Chang, C.S.Wang, A.H.J.Wang, T.F.

(2007) Nucleic Acids Res 35: 1787-1801

  • DOI: 10.1093/nar/gkl1131
  • Primary Citation of Related Structures:  
    2DFL

  • PubMed Abstract: 
  • The RecA family of proteins mediates homologous recombination, an evolutionarily conserved pathway that maintains genomic stability by protecting against DNA double strand breaks. RecA proteins are thought to facilitate DNA strand exchange reactions ...

    The RecA family of proteins mediates homologous recombination, an evolutionarily conserved pathway that maintains genomic stability by protecting against DNA double strand breaks. RecA proteins are thought to facilitate DNA strand exchange reactions as closed-rings or as right-handed helical filaments. Here, we report the crystal structure of a left-handed Sulfolobus solfataricus RadA helical filament. Each protomer in this left-handed filament is linked to its neighbour via interactions of a beta-strand polymerization motif with the neighbouring ATPase domain. Immediately following the polymerization motif, we identified an evolutionarily conserved hinge region (a subunit rotation motif) in which a 360 degrees clockwise axial rotation accompanies stepwise structural transitions from a closed ring to the AMP-PNP right-handed filament, then to an overwound right-handed filament and finally to the left-handed filament. Additional structural and functional analyses of wild-type and mutant proteins confirmed that the subunit rotation motif is crucial for enzymatic functions of RecA family proteins. These observations support the hypothesis that RecA family protein filaments may function as rotary motors.


    Organizational Affiliation

    Institute of Biochemical Sciences, National Taiwan University, Taipei, Taiwan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA repair and recombination protein radAA324Saccharolobus solfataricusMutation(s): 0 
Gene Names: radA
Find proteins for Q55075 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2))
Explore Q55075 
Go to UniProtKB:  Q55075
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.226 
  • Space Group: P 43
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.183α = 90
b = 55.183β = 90
c = 125.576γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
CNSrefinement
HKL-2000data reduction
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-01-23
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance